UF4004(2012) Ver la hoja de datos (PDF) - Infineon Technologies

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Fabricante

UF4004
(Rev.:2012)

Phase Cut Dimmable Non-isolated Buck Converter for LED Retrofit Bulb with ICL8002G & CoolMOS™ 600V C6

Infineon Technologies 

AN-EVALLED-ICL8002G-B2

Phase Cut Dimmable Non-isolated Buck Converter for LED Retrofit Bulb with ICL8002G & CoolMOS™ 600V C6

9.5

Input Waveforms

Figure 7 shows the waveforms of input voltage, input current, and the current shunt voltage during normal

operation at 120Vac and full load.

Figure 7 Input voltage Vin (C2, blue), Input current Iin (C4, green) and shunt voltage Vcs (C2, red)

9.6

Power Factor Correction

The measured power factor and total harmonics distortion (THD) at different input voltages are shown in Figure

8. The power factor is above 0.95 over the whole input voltage range.

PF & THD vs. AC input voltage

Power Factor

THD

1

25%

0.98

20%

0.96

15%

0.94

10%

0.92

5%

0.9

0%

80

90

100

110

120

130 140

Input Voltage [Vac]

Figure 8 Power Factor and THD versus line voltage

Application Note

11

Version 1.1, 2012-08-03

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